THE CAROTID ARTERIES OF BIRDS. 171 
Chrysotis levaillantii. _ Platycercus eximius 
Psephotus hematogaster — ‘ 
Cyanorhamphus auriceps. Psitiacula passerina. 
— nove zealandie. Lathamus discolor. 
In the following species, forming the fourth section, the left 
carotid only is developed :— 
Cacatua galerita. Cacatua cristata. 
I have not yet had an opportunity of examining the third con- 
_ dition, #.e. that said to occur in Cacatua sulphurea. 
; ACCIPITRES. 
Both carotids are present in all these birds. 
Species examined. 
CaTHARTID2. Archibuteo lagopus. 
Cathartes atratus. araaien SSnrsgg 
Gyparchus papa. aliaétus lla. 
Ea —— vocifer. 
VULTURIDZ. Aquila nevioides. 
= Neophron percnopterus. —— audaz. 
; Gyps Sulcus. Spilornis cheela. 
Thrasaétus harpyia 
SERPENTARIIDZ. Falco peregrinus. 
Serpentarius reptilivorus. —— melanogenys. 
Hypotriorchis subbuteo 
Fatconipe. Tinnunculus alaudarius. 
Polyborus brasiliensis. Melieraz monogrammicus. 
Milous ictinus. Astur palumbarius. 
Buteo vulgaris. Circus cineraceus. 
Sreicipz. 
Both carotids are present in these birds. 
Species examined. 
Striz flammea. Bubo poensis. 
Otus vulgaris. fasciolatus. 
Syrnium aluco. Ketupa javanensis. 
nebulosum. Scops zorea. 
Bubo mazimus. Athene noctua. 
virginianus. —— passerina. 
——- bengalensis. —— brama. 
